4 Refill CartridgesEach refillable razor cartridge includes 5 of our sharpest and thinnest blades to glide over your skin for a flawless shaveWater-activated ribbon of moisture around your razor blades helps protect your skin from nicks or cutsPivoting razor blades contour to your every curve on your legs, knees, ankles and underarmsYour razor cartridge has a MicroFine comb that guides hair to the blades that capture virtually every hairAny Venus razor blade refill fits any Venus razor handle, except Simply Venus.